31123213111122 has 64 divisors (see below), whose sum is σ = 68468837345280. Its totient is φ = 9430939882320.

The previous prime is 31123213111103. The next prime is 31123213111147. The reversal of 31123213111122 is 22111131232113.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31123213111092 and 31123213111101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310118083 + ... + 310218425.

It is an arithmetic number, because the mean of its divisors is an integer number (1069825583520).

Almost surely, 2^{31123213111122} is an apocalyptic number.

31123213111122 is an abundant number, since it is smaller than the sum of its proper divisors (37345624234158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31123213111122 is a wasteful number, since it uses less digits than its factorization.

31123213111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139220 (or 139198 counting only the distinct ones).

The product of its digits is 432, while the sum is 24.

Adding to 31123213111122 its reverse (22111131232113), we get a palindrome (53234344343235).

The spelling of 31123213111122 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred thirteen million, one hundred eleven thousand, one hundred twenty-two".